On Wed, Apr 30, 2008 at 12:19:27PM -0700, Dave Engvall wrote: > > On Apr 30, 2008, at 11:15 AM, Janos Dosa wrote: > > ><snip> > >At the speed of 2100 mm/min the error from the theoretical path is > >huge around 50mm (2 inches) or so. Same problem in smaller scale if > >the machine is slower. > > Your machine should fault with a following error long before it gets > to 2" of error. > > This sounds like a servo tuning problem: start up halscope and plot > axis position, axis commanded and > following error.
It sounds like these are step servos. In that case there is no tuning to be done inside EMC. If their position lags inches behind the commanded steps, something is terribly wrong with them. EMC can't detect this because of the nature of step servos. With a full servo configuration, EMC would instantly detect this fault like Dave says. Chris ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
